Bramble Inc. uses the perpetual inventory system and the weighted average cost formula to valore inventories on August 1, there were 6000 units valued at $12000 in the beginning inventory. On August 10, 9000 units were purchased for 58 per unit. On Aupast 15, 9000 units were sold for $14 per unit. The amount charged to cost of goods on August 15 was $36000. 550400 $72000 $54000